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Using "--no-cache-dir" flag in pip install ,make sure dowloaded packages by pip don't cached on system . This is a best practise which make sure to fetch ftom repo instead of using local cached one . Further , in case of Docker Containers , by restricing caching , we can reduce image size. In term of stats , it depends upon the number of python packages multiplied by their respective size . e.g for heavy packages with a lot of dependencies it reduce a lot by don't caching pip packages. Further , more detail information can be found at https://medium.com/sciforce/strategies-of-docker-images-optimization-2ca9cc5719b6 Signed-off-by: Pratik Raj <rajpratik71@gmail.com>
35 lines
857 B
Docker
35 lines
857 B
Docker
#
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# Dockerfile for tmail
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#
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FROM alpine
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MAINTAINER kev <noreply@easypi.pro>
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RUN apk add --update build-base \
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python \
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python-dev \
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openssl \
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&& wget -O- https://bootstrap.pypa.io/get-pip.py | python \
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&& pip install --no-cache-dir twisted \
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&& apk del --purge build-base \
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python-dev \
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openssl \
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&& rm -rf /var/cache/apk/*
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ENV MAIL_NAME easypi.info
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ENV MAIL_PATH /var/mail
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ENV MAIL_USER admin
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ENV MAIL_PASS admin
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ENV MAIL_OPTS=
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VOLUME /var/mail
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EXPOSE 25 110
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CMD twistd -n mail --smtp=tcp:25 \
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--pop3=tcp:110 \
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--maildirdbmdomain=$MAIL_NAME=$MAIL_PATH \
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--user=$MAIL_USER=$MAIL_PASS \
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--bounce-to-postmaster \
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$MAIL_OPTS
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